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( No Model.) 3 Sheets-Sheet 1.

J. H. TUFPS.

GAS FURNACE. No. 492,367. Patented Feb. 21, 1893;

lV/TNESSES. JNVENTOR,

A TTORNE YJ 3 Sheets-Sheet 2. J. H. TUFFS. I

GAS FURNACE.

(No Model.)

Patented Feb. 21, 1.893.

JNVENIOR. 7

A TTORNL' Y5- (No Model.) 3 Sheets-Sheet 3.

J.H.,' TUFPS.

GAS FURNACE. No. 492,367. v Patented Feb. 21, 1393.

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Nrrnn TATES PATENT Fries.

JOHN H. TUFFS, OF SYRACUSE, NEW YORK, ASSIGNOR OF ONE-HALF TO AUSTIN C. WOOD, OF SAME PLACE.

GAS-FURNACE.

SPECIFICATION forming part of Letters Patent No. 492,367, dated February 21, 1893.

Application filed April 1, 1892. Serial No. 427,325. (No model.)

To all whom it may concern.-

Be itknown that I, JOHN H. TUFFS, of Syracuse, in the county of Onondaga,in the State of New York, have invented new and useful Improvements in Gas-Furnaces, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

My invention relates to gas furnaces, and my object is to provide improved means for automatically supplying hot water to the ashpan, and steam to the fire, such steam being supplied below the grate, and fully and evenly distributed through and in the fire, so that the benefits derived therefrom are uniform throughout the fire and combustion chamber.

It consists in the several novel features of construction and operation hereinafter described and which are specifically set forth in the claims hereunto annexed.

It is constructed as follows, reference being had to the accompanying drawings,in which Figure 1, is a combined front and transversely and vertically sectional elevation showing on the left, the front of the bench and retorts with part of the covers secured thereon showing near the center, part of the front of the bench and furnace removed, and on the right showing a vertical transverse section of part of the furnace, retorts and combustion chamber and ash-pit. Fig. 2, is a vertical longitudinal section of a furnace complete, with the furnace door omitted, on line 3 2 Fig. 3. Fig. 3, shows on the lefta transverse horizontal section on the line a .2, Fig. 2, and on the right a like section on line as as, Fig. 2, in a plane higher than that of the section on the left.

A, is the front provided with the feed door -a, the ash-pit door -b-, the stoppers -c-, the clean-out openings for the lines c'- (Fig. 3) for the waste gases, and with the slides d which regulate the flow of air into the flues -efor the secondary draft. These flues -c' are the ordinary rearward, extending take-01f fines created by the laying up of the brickwork are connected to the combustion, or retort, chamber bya passage (not shown) and as shown by the dotted lines in Fig. 2, merge into and pass up through the chimney, shown on the upper right hand corner. They conduct the products of combustion and waste gases through the brick-work, and to the chimney, thereby utilizing much, otherwise wasted, heat by heating the secondary draft fines e-.

B- ]3, are the retorts set in benches in the furnace arch in the usual manner.

D-, is the fire-pot or fuel chamber, provided with a grate -h of ordinary construction, and a water pan h'. in the ashpit below the grate.

The secondary draft fines by means of the vertical walls -eare extended clear back to the back of the furnace, and then by means of the rear wall andthe short alternating vertical partitions e are made zigzag and conducted to the front, and thence by the lateral goose-neck or doubly curved discharge flues -e" open into the combustion chamber above the fire. These fiues consist of longitudinal outer fines e extending from the front to the rear of the furnace, the transverse rear lines 6' the short longitudinal rear fines 6 and the longitudinal inner flues 6" extending toward the front of the furnace. These flues are wholly contained within the brick-work constituting the base of the furnace, and are highly heated by the heat absorbed by said brick-work, so that when the secondary draftair is discharged into the combustion chamber, it will readily combine with the gases of combustion. The longitudinal short flues and the transverse fiues being located in the base of the furnace, in the brickwork at the rear of the fire-chamber, I utilize the heat contained in the mass of brickwork beneath the outlet of the combustion chamber. In the front and just below the fuel opening -7 I place a water chamber --wof substantially the form shown in cross section in Fig. 2, constituting the front of the fire-chamber, and the bottom of the feeddoorway, and is heated by the contact of the fuel with its inner vertical and inclined wall. An overflow pipe -m is also provided, by which the water is fed down into the ash-pit water-pan,by which the water is maintained in the chamber at substantially a uniform level, and by which the steam generated in the chamber is conducted into the ash'pit, and together with that generated from the water-pan, is conducted through the grate into the fire, as an aid to combustion. An inlet pipe n supplies the water to said chamber. A deflecting plate 1" across the front of the top of the combustion chamber, prevents the gases of combustion from passing up along the front of the furnace. By this arrangement ofawater chamber heated directly by the fire, in conjunction with the water-pan in the ashpit, I insure an even and uniform supply to the fire of all of the steam which is essential as an aid to combustion, keep the chamber supplied with water and also the ash-pit pan. Also by this arrangement of the secondary draft does, I save many brick and much expense in the construction of the base, utilize heretofore Waste space, utilize heretofore Wasted heat, and present the air in a superheated condition to the combustion chamber, and by the goose-neck discharge openings I i am enabled to discharge the air into the gases of combustion, above the fire, though these secondary draft flues are substantially below the top of the fire; and also these flues with their upward discharge possess a positive draft; and further they cannot be clogged, or interfered with in any manner by the coal or ashes. On account of all of these respective and co-operating functions, by my invention the utility of the furnace is very much increased, and much better results obtained, through the more speedy coking of the coal and the saving of fuel.

i/Vhat I claim as my invention, and desire to secure by Letters Patent, is-

A gas furnace comprising a combined water and ash-pan beneath the fire pot, the water tank 20 forming the front vertical Wall of the fire-chamber, and the inclined bottom of the feed-door opening or way, having a com-- bined overflow and steam pipe located therein, over and discharging onto the pan beneath; substantially as described.

In witness whereof I have hereunto set my hand this 29th day of March, 1892.

JOHN H. TUFFS. In presence of- JOEL G. JUSTIN, HOWARD P. DENISON. 

